The Season 12 cast of NBC's "The Biggest Loser." The show has spawned diets, fitness classes, gadgets, clothing and more all aimed at teaching people to eat healthy and be fit.

The Season 12 cast of NBC's "The Biggest Loser." The show has spawned diets, fitness classes, gadgets, clothing and more all aimed at teaching people to eat healthy and be fit. (NBC / Chris Haston/NBC HANDOUT)